Table 3: Sensitivity (Sensitivity-RA) and Specificity for the Diagnosis of RA when Compared to Osteoarthritis (Specificity-O), Healthy (Specificity-H), and All Controls (Specificity-All) Using the Semiquantitative Synovial Score and the Combined Structural/Synovial Score

"RA-Supported" >0 Semiquantitative Synovial Score Combined Structural/Synovial Score
Sensitivity-RA 1 0.95
Specificity-O 0 0.57
Specificity-H 0 0.94
Specificity-All 0 0.77
"RA-supported" >1 Semiquantitative Synovial Score Combined Structural/Synovial Score
Sensitivity-RA 1 0.73
Specificity-O 0 0.93
Specificity-H 0 1
Specificity-All 0 0.97

The top half of the table shows results when a patient is diagnosed as RA if any joint is classified as “RA-supported”, and the bottom half shows results when a patient is diagnosed as RA if more than one joint is classified as “RA-supported”.